<%--
  Created by IntelliJ IDEA.
  User: john
  Date: 2015/3/13
  Time: 19:16
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title></title>
</head>
<body>
<script type="text/javascript">
    var arg = 1;
    function test() {
        var arg;
        alert(arg);
        arg = 2;
    }
    test();
</script>
</body>
</html>
